US2669429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for drilling deviating bores utilizing a plurality of curved tubular drillguide sections
Assignee: Individual
•
Filing: 1951-11-06
•
Granted: 1954-02-16
•
Expires: 1971-11-06
Abstract
No abstract record available.
Inventors
- 👤 John A Zublin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:10
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/04; E21B7/06; E21B7/061; Y; Y10; Y10T; Y10T408/00; Y10T408/65; Y10T408/665
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2296161A
Cited
US2501217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |